«فبلاغة الكلام: مطابقته لمقتضى الحال مع فصاحته»
The balāghah of an utterance is its conformity to the requirement of the situation, together with its eloquence.
The definition combines two conditions. First, the utterance must be free of the defects that compromise fasāḥah. Second, its form—such as detail, brevity, or emphasis—must suit the communicative context.
A grammatically sound and intelligible sentence can be poorly suited to the situation. Conversely, a seemingly appropriate choice of style cannot make an expression balīgh if it is linguistically defective.